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Finding the Fourth Proportional to 8,936.64, 13,391.28 and 3,739.68

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Solution

The fourth proportional to 8,936.64, 13,391.28 and 3,739.68 is: 5,603.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,936.64 : 13,391.28 = 3,739.68 : x
  2. Step 2: Convert to fraction form
    8,936.64/13,391.28 = 3,739.68/x
  3. Step 3: Cross multiply
    8,936.64x = 13,391.28 × 3,739.68
  4. Step 4: Simplify right side
    8,936.64x = 50,079,101.99
  5. Step 5: Solve for x
    x = 50,079,101.99/8,936.64
  6. Step 6: Final answer
    x = 5,603.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.